Skyroot’s Vikram-1 makes first private Indian orbital launch
On July 18, 2026, the Vikram-1 rocket built by the Hyderabad-based startup Skyroot Aerospace lifted off from ISRO’s First Launch Pad at Sriharikota.
The seven-storey vehicle placed its payloads into an orbit roughly 450 km above the earth about 15 minutes later. The mission, named Aagaman, made India only the third country — after the United States and China — whose private industry can reach orbit on its own launch vehicle.
The 3D-printed engine that powers the rocket
Rocket engines have traditionally been forged, machined and welded from dozens of separate parts. Skyroot’s approach is different. The company uses 3D printing — what engineers call additive manufacturing — to build the engine as a single piece. A laser fuses metal powder layer by layer, building the part from nothing.
This method sheds the bolts, seals and joints where conventional engines tend to leak and fail. When Skyroot test-fired its Raman engine in 2020, the company said the fully printed injector halved the mass and cut the number of components and lead time by 80% compared with conventional manufacturing.
Complex internal plumbing — the fine cooling channels that let Vikram-1’s regeneratively cooled engine chill itself with its own propellant — can be printed in shapes no drill can reach. Prototypes emerge in days, not months, so a startup can test, fail and redesign at a pace that would have been unthinkable in ISRO’s traditional supplier chains.
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But there are downsides.
Peer-reviewed surveys flag issues like porosity, rough internal surfaces, and batch-to-batch variability. NASA has documented a printed copper combustion chamber that failed on the test stand because of degraded material quality. A printed engine is faster and lighter, but it demands obsessive quality control — the flaw hides inside the layers.
Why the carbon-composite body matters
If the engine is printed, the airframe is woven. Skyroot uses carbon-fibre composite — filaments of near-pure carbon set in resin — which offers specific strength many times that of aerospace aluminium or maraging steel. The startup claims a five-fold saving over the best rocket steel. Every kilogram of structure trimmed is a kilogram of satellite gained.
The approach follows the path set by Rocket Lab’s Electron rocket. Vikram-1’s Stage-1 is India’s longest single-piece composite rocket stage. The material resists fatigue and corrosion and can be laid up by automated machines into seamless tubes.
There are trade-offs. The material and its curing infrastructure are expensive. Its strength runs along the fibres, so a poorly designed laminate is strong in one direction and brittle in another. Damage — a delamination from a knock during transport — can hide invisibly beneath a perfect surface, requiring ultrasonic inspection where a dent in aluminium would be obvious.
At this stage, Skyroot’s all-carbon approach looks like a bet on speed and weight savings over the more conventional steel-and-aluminium structures used by ISRO’s rockets. Whether that bet pays off over many launches will depend on how well the company controls the hidden failure modes that composite materials can conceal.
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How Vikram-1 compares to ISRO’s rockets
In architecture, Vikram-1 resembles the PSLV. Both are four-stage expendable rockets that end with a restartable liquid stage for precise orbital insertion. The rocket’s Orbital Adjustment Module is a miniature cousin of the PSLV’s PS4. Both lean on India’s long experience with solid propulsion.
But the scale is different. The PSLV is a 44-metre, 320-tonne workhorse that lifts 1,750 kg to polar orbit. Vikram-1 is a 22-metre featherweight stacking three solid stages under its liquid module to carry 350 kg. The PSLV wears maraging steel; it wears carbon.
The nearer analogue is ISRO’s SSLV, and there the comparison sharpens. The two are architectural twins: three solid stages capped by a small restartable liquid module, both designed for small satellites on short notice. On raw capacity, ISRO wins: SSLV lifts 500 kg to low earth orbit, exceeding the smaller rocket’s payload capacity.
However, Vikram-1’s all-carbon airframe is leaner than SSLV’s conventional casings, its printed engine is built for faster iteration, and — the deepest difference — the institutional model. SSLV was designed by the state and its production licensed to Hindustan Aeronautics Limited for ₹511 crore. The Skyroot rocket is owned outright by its maker, financed by venture capital, priced by the market.
A near-flawless maiden flight
Reports confirm every milestone was met, including a tricky phase called ‘long coast’ — the rocket had to hold its attitude with nothing pushing it, then execute the final burn of the printed engine.
For a maiden flight whose stated ambition was merely to clear the tower and gather data, reaching orbit is over-achievement. Electron, Firefly’s Alpha and ISRO’s own SSLV all stumbled the first time.
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The rocket carried five working payloads and two talismans. The payloads include a robotic-arm demonstration by Cosmoserve Space aimed at grabbing space debris; the SOLARAS satellite from Grahaa Space; Skyroot’s own SCOPE experimental satellite; and two deployable-technology demonstrators, uD3PP and mD3RN, from the German firm Dcubed.
Alongside flew a lab-grown diamond lotus and an 18-karat gold micro-rocket bearing rice-grain sculptures of Sarabhai, Raman and Kalam — the three names Skyroot gives its rockets and engines. The company said all payloads have been deployed.
The private space race in India
Skyroot holds both of Indian private spaceflight’s firsts — the suborbital Vikram-S in November 2022, and now orbit with customer payloads. But Chennai’s AgniKul Cosmos runs a parallel course. Its Agnibaan SOrTeD flew sub-orbitally in May 2024 from India’s first private launchpad, using the world’s first single-piece 3D-printed engine — a semi-cryogenic design burning liquid oxygen and kerosene, a propellant technology ISRO itself is still maturing.
Having test-fired four Agnilet engines in a cluster this May, and with former ISRO chairman S. Somanath joining its board, AgniKul is preparing Mission 02. That flight is a two-stage Agnibaan attempting India’s first sea recovery of an orbital-class booster, with its upper stage staying alive in orbit as a working platform. The mission aims at reusability — the technology that rewrote launch economics, and the next barrier Indian rockets must clear.
Since the 2020 reforms and the creation of IN-SPACe in 2022, India’s space startups have multiplied from a handful to more than 400. Until Saturday, they all needed ISRO’s rockets to fly. A private launcher turns ISRO from gatekeeper into landlord — and turns access to orbit from a national programme into a market. The small-satellite launch business is supply-starved worldwide. Skyroot pitches itself as a cab service to space. Saturday was only the first ride.
